lib-src/vcdiff

   1 #!/bin/sh
   2 #
   3 # Enhanced sccs diff utility for use with vc mode.
   4 # This version is more compatible with rcsdiff(1).
   5 #
   6 #       $Id: vcdiff,v 1.1 1992/08/04 16:08:22 eric Exp eggert $
   7 #
   8
   9 DIFF="diff"
  10 usage="$0: Usage: vcdiff [-q] [-r<sid1>] [-r<sid2>] [diffopts] sccsfile..."
  11
  12 echo=
  13 sid1=-r sid2=
  14
  15 for f
  16 do
  17         case $f in
  18         -*)
  19                 case $f in
  20                 -q)
  21                         echo=:;;
  22                 -r?*)
  23                         case $sid1 in
  24                         -r)
  25                                 sid1=$f
  26                                 ;;
  27                         *)
  28                                 case $sid2 in
  29                                 ?*) echo "$usage" >&2; exit 2 ;;
  30                                 esac
  31                                 sid2=$f
  32                                 ;;
  33                         esac
  34                         ;;
  35                 *)
  36                         options="$options $f"
  37                         ;;
  38                 esac
  39                 shift
  40                 ;;
  41         *)
  42                 break
  43                 ;;
  44         esac
  45 done
  46
  47 case $# in
  48 0)
  49         echo "$usage" >&2
  50         exit 2
  51 esac
  52
  53
  54 rev1= rev2= status=0
  55 trap 'status=2; exit' 1 2 13 15
  56 trap 'rm -f $rev1 $rev2 || status=2; exit $status' 0
  57
  58 for f
  59 do
  60         s=2
  61
  62         case $f in
  63         s.* | */s.*)
  64                 if
  65                         rev1=/tmp/geta$$
  66                         get -s -p -k $sid1 "$f" > $rev1 &&
  67                         case $sid2 in
  68                         '')
  69                                 workfile=`expr " /$f" : '.*/s.\(.*\)'`
  70                                 ;;
  71                         *)
  72                                 rev2=/tmp/getb$$
  73                                 get -s -p -k $sid2 "$f" > $rev2
  74                                 workfile=$rev2
  75                         esac
  76                 then
  77                         $echo $DIFF $options $sid1 $sid2 $workfile >&2
  78                         $DIFF $options $rev1 $workfile
  79                         s=$?
  80                 fi
  81                 ;;
  82         *)
  83                 echo "$0: $f is not an SCCS file" >&2
  84         esac
  85
  86         if test $status -lt $s
  87         then status=$s
  88         fi
  89 done